@KPAracing Not quite. If I remember correctly, the lab that was filming this (if this is the same one) had a bearing failure (which is what you hear up until the connecting rod finally let go) and you see the end result. The engine "picking up" was from internal resistance catastrophically building up as time passed. Most of these things control at a speed/torque relationship, so however their control was set up, would generally increase throttle to compensate for the lost load output.
Actually, I think this was probably a development mule, which is why they were filming it. I would imagine that the entire point of the test was to frag the engine to see what broke.
Would be nice to have a look inside this engine, to see what is left there. Looks like a burned piston caused a connection rod to break, then vavles break and finally something got stuck with with the crankshaft throwing it entirely out of the engine. This is a massive malfunction and showes what forces rage inside a machine like that. Awsome!
Come to think of it, probably part of the dynamometer load system, as the engine loads up, starts to bog down, at that moment. Seems like it was revved up no load prior to that, then this engaged the load and boost ramped up.
All very much like my first marriage. Nice n smooth, purring along then Bam! Cough! Puking oil and other juices everywhere in a plume of smoke. Dub in some cussing and it would be pretty close.
@BeeEmmW Yeah true man, that makes sense!! Either way, I still think this was an intentional failure to see how the block might stand up... I dont know :/
Very good question...! I am not sure about the answer but consider: This is not a failure - it´s a test. In the full video you seee a firefighter entering the test cell directly after it chrashes. A possible answer: Engine is runnig at a high load poin, than at sec.: 24 a valve (you see it next to the air filter) shuts the complete exhaust. Even though the pressure after the turbo rises, but the turbine wheel still produces enough pressure to get fresh air into the cylinder and enable combust
Hey, a sweet girlfriend did that while we were dating in H.S. to my company-supplied pickup truck as we were going about 25mph down the street. Stalled the engine, scared me (thinking "I'm dead") and worse. 50 years later we still keep in touch!
My favorite was the girlfriend telling me that the oil light came on when she left work. Can you look at it? After driving at 70 for the 40 miles or so home.
This is a case of overrevving when the enginebrake failed and it revved up to its breaking point, Imagine you driving 180 mph in 5th gear and then put it in 1st gear and then without the engine brake protecting your engine, it will rev craaaaazy high
No it won't you'll get compression lockup and the wheels will essentially lock up and you will crash, this will still probably blow your engine up but you have absolutely no idea what you're talking about.
+John Cheesecake i warranty it will block your tires!! i tried that a few years ago and it blocked the rear tyres. it was a rwd, of course... i downshifted from 4th to 2nd and i shitted my pants
its called a run away. diesels dont need spark. just compression. so once oil starts gettin passed the rings the engine just keeps goin till it blows up, or you stop the air flow by stuffing something in the intake.
yes if you watch very closely around 0:31 you can watch the rod fly out of the oil pan (the rods control the valves which let the air and fuel mixture into the piston and the exhaust out ).
yes but the pressure will keep building up because the pressure going into the cylinder is actually far grater than pressure going out. yes the burnt gases will escape through the intake but it will just re-enter again with the fuel with it.
That, my friend, Is the beautiful sound of metal on metal. It starts with a light scratching, then the heavy parts go in and you can hear everything getting torn apart on the inside. After that, there's only Nirvana
@danwat1234 What you saw was the brake arm being pressed against the tail-shaft. This is a destructive load test. What you see happen is the crankshaft twisting itself in two before breaking the oil pan to bits. Based on what I can see in the video, that engine was putting out at least 700bhp at close to 9k RPM based on the pitch of the engine.
@ youngdones anything can be fixed... looked to me like something cut loose in the top end and caused at least two rods to blow out of the oil pan. I'd be really surprised if the crank isn't junk too. So short answer is yes, but I'd say it's time to start with a new motor
I think is been properly explained already but yes is very likely been the case that a conn-rod bering seized (first squeaking) and may be they meant to continue the test or may be they were not looking?, weird but once the bearing seized to the crank shaft what happens is the rod cut of, and then the crankshaft keeps on turning of course with the part of the rod welded to that journal and brakes the block around loosing oil but also unbalancing the crankshaft very fast and surely #2
yes it seems it is a v8, I think someone else said that it was a marine engine, if so then i would expect it to be quite big. i would guess way over 5-6 liters.
#2 in this case causing other rod braking making more bit and pieces blow around, not a veri nice thing to do with an engine though, I guess it was a test of braking point? extrem load ? but it could happen in normal duty if oil pump fails or bad assembling or a very cold engine reved up to quickly
@JohnxWaynexGacy it's a diesel, it ran away it sounds like meaning it ran off it's own oil somehow due to a failed ring, headgasket. anyway motor oil gets into the combustion chamber and because it's a compression fired engine, well you can't just turn off compression...
It looks like a MAN TGX V8 engine. (it is a diesel). They are made in Germany. Seems to have had a dyno-failure which released the load and underwent an over speed.
@BeeEmmW What I think happened here was that they were stress testing the engine by inducing abnormal forces on the crankshaft. I'm really no expert, but the sound that follows, and the noticeable movement of the engine makes me think they applied stress to the crankshaft, therefore overworking the engine causing it to blow. Could be wrong though??
look over the back of the engine. There is a lever or some shit that goes down when the engine starts to make noise. Might be a bubble in a float gauge. Possibly oil pressure?
I heard of 2 stroke Detroits running away like this. Apparently even cutting the fuel is not enough to shut them down as they will start pulling oil from the crank case and burn that too. Only way to shut down a runaway Detroit is a co2 fire extinguisher to the intake. At least that's what I was told by a guy that seemed to be a pretty knowledgeable mechanic.
Its the timing, its all over the place........ So is the cam, valves, con rods, pistons, followers and the rockers! Apart from that it flew threw its MOT!!
@jogrobler it makes the sound when an engine compresses something other than air, like water, possibly head gasket failed, water in cylinder(s) over compression and expansion BOOM - me thinks
If you see in the back it looks like they shut some kind of exhaust valve to create massive back pressure. Looks like it was some kind of test..you can hear the noise as you see that valve move down.
i worked in engine testing years ago i was standing next to a cosworth engine at full power 7000 rpm when the cardon shaft to the brake let go...it hit every wall in the test cell but i was lucky,dangerous job
Yes, it's a test but we don't know if the engines destruction was part of the plan. I don't think it was supposed to happen but surely they have to consider things like that to happen. And as I said in another comment intake pressure is limited by a bypass valve, wastegate or blow off valves, it cannot increase endlessly.
i guess it comes to experience. the mine i worked at use Komatsu 1000hp engines to power their haul trucks and they never went wrong. same with the German engines they had in a few of the smaller 100 ton trucks. on the other end the Detroits with double super chargers where always down, but to be fair they where twice as old. but power wise detroit decimates all
@danwat1234 Destructive metalurgy testing, they wanted to simulate worst case scenario for determining mode of failure of the weakest component, in this case the crankshaft could not hold back the immense downforce put on it by the traveling piston near the back end of the engine. The closest real world analogy would be going from 100mph to 0 in 3 seconds or less without disengaging the driveline while at full throttle.
@smpstech thats wat i was thinkin aswell an MTU the only thing that gave it away for me was the shape of the rocker covers the normaly have " MTU either stamped or cast with the cover
gotta love having a seized exhaust valve. no one could think one seized exhaust valve can do that much damage. well I believe it was an exhaust valve that caused it by the way it sounded. throwing all your Rods doesn't just happen. for something like that its most likely a seized exhaust valve and due to the pressure build up it threw rods and possibly the crank.
ion, so peak cylinder pressure raises rapidly. I guess this test is made to see what happeneds if truck retarder (encreasing engine motoring torque by closing the exhaust) fails and accidently is enabled during full load engine operation.
Very nice ! I nearly finished my engineer Bachelor and i can say that somehow one Piston or one bearing of the engine doesnt get lubricated enough, and u can hear the engine ream at 0:25 an after some time the bearings get to hot and it explodes :) But olso could be something other, but this happens most of the time
@BlueAlchemist Could have been the piston rings, especially if this is footage from an oil test where they ran the engine until the oil failed and it blew up. Honestly, that's what I suspect; it coulda been running for a week before it blew as far as we know. Interesting you'd say that about the crank -- that shrieking right before it blew sounded to me like a crank grinding against the block with no bearings between them. No bearings + seizing pistons = crankshaft go bye bye.
never use a four stroke in racing or high energy applications. as well as the engine oil needs to be replaced with gear oil, which would lower the wear.
In your first post you said INTO the PISTON, and in your second you said cylinder. Number 2 is correct. And I never got on you about the valves because you were right on. Your first engine sounds like the one in the video :-)
Zachary Durand Must have been a cummins....., because after the block blew, the pullys rocketed and the oil was streaming out the rest of the topend, the pistons were still firing, LOL that's a keeper
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Nothing a little Flex Seal can't fix...
Get Phil Swift on the line!
I can fix it
Hey
on this episode of will it run
Better or worse than that seized Marine disel you found
Yes
But we gotta have a tear down by I Do Cars first.
@KPAracing
Not quite. If I remember correctly, the lab that was filming this (if this is the same one) had a bearing failure (which is what you hear up until the connecting rod finally let go) and you see the end result. The engine "picking up" was from internal resistance catastrophically building up as time passed. Most of these things control at a speed/torque relationship, so however their control was set up, would generally increase throttle to compensate for the lost load output.
I love how it’s still going full speed even after it starts coming apart. Bang bang bang. Lots of kinetic energy.
Reminds me of my first marriage.
@@5150Bud lmao funny ass comment
The parts flying out of this engine were of the finest quality.
Actually, I think this was probably a development mule, which is why they were filming it. I would imagine that the entire point of the test was to frag the engine to see what broke.
Richard Rowe yea I believe so as well. Almost like they dropped a over loaded amount of torque on the motor to see what would fail first And how
Would be nice to have a look inside this engine, to see what is left there. Looks like a burned piston caused a connection rod to break, then vavles break and finally something got stuck with with the crankshaft throwing it entirely out of the engine. This is a massive malfunction and showes what forces rage inside a machine like that. Awsome!
Where most small engines would've swelled the crank bearings and seized up. A big diesel is like a horse! It'll quite literally run itself to death.
0:23 look at the left side near that bigger tube, you'll see some small lever lowered down
Marijana Brezić ya I saw it to behind it
Could be an oil pressure indicator.
Probably loading the engine up
Come to think of it, probably part of the dynamometer load system, as the engine loads up, starts to bog down, at that moment. Seems like it was revved up no load prior to that, then this engaged the load and boost ramped up.
i feel like there shouldve been "Viewer discretion advised graphic content"
Great video! Rarely do you get to see the bottom end coming apart like that, since the engines are usually installed...
VTec Kicked in Yo
I love the flat line sound after it blows up lol
Daaaaamn! I've never seen an engine belch out so many parts!
@DPense
thats the braking load being placed on the engine, failure comes later
That was friggin AWESOME!!
It sounds so good when the dyno first droops in
Love the way it "barfs" at the end!
When parts and pieces start falling out of the engine let up on the throttle.
All these years later and this is still one of the best blowing of an engine I've ever seen.
"is that sound bad?"
"...nnaaahhhh more power!"
Crazy how it blows the bottom end off and actually raises in rpm for a second!
Did it break? Come on! Start it again!
Kinda wish I could see the RPMs as well as the pressure of a few things while watching this..
All very much like my first marriage. Nice n smooth, purring along then Bam! Cough! Puking oil and other juices everywhere in a plume of smoke. Dub in some cussing and it would be pretty close.
That's right! It's why I always say marriage and hurricanes are just alike. At first there's a lotta sucking and blowing, then you loose your house!
Hey there! Jesus Christ loves you. He is the only way to heaven. May God bless you! 😊
@BeeEmmW Yeah true man, that makes sense!! Either way, I still think this was an intentional failure to see how the block might stand up... I dont know :/
0:29
Coolest video I've seen today!
Should be 18+
Very good question...! I am not sure about the answer but consider: This is not a failure - it´s a test. In the full video you seee a firefighter entering the test cell directly after it chrashes. A possible answer:
Engine is runnig at a high load poin, than at sec.: 24 a valve (you see it next to the air filter) shuts the complete exhaust. Even though the pressure after the turbo rises, but the turbine wheel still produces enough pressure to get fresh air into the cylinder and enable combust
it just needs a little coolant...
Wow that diesel sounded as if it was turning 5,000 plus rpms. Insane for a diesel.
Did she put it in reverse again without watching ?...
(hè hè hè... giggity...)
Hey, a sweet girlfriend did that while we were dating in H.S. to my company-supplied pickup truck as we were going about 25mph down the street. Stalled the engine, scared me (thinking "I'm dead") and worse. 50 years later we still keep in touch!
My favorite was the girlfriend telling me that the oil light came on when she left work. Can you look at it? After driving at 70 for the 40 miles or so home.
me too, they must had heard it failing, You can hear the bearing failure start at 18s
This is a case of overrevving when the enginebrake failed and it revved up to its breaking point, Imagine you driving 180 mph in 5th gear and then put it in 1st gear and then without the engine brake protecting your engine, it will rev craaaaazy high
that must be one hell of a truck to go 180 mph in 5th gear
when you put it from 5th to 1st gear your enine explode.
No it won't you'll get compression lockup and the wheels will essentially lock up and you will crash, this will still probably blow your engine up but you have absolutely no idea what you're talking about.
+John Cheesecake i warranty it will block your tires!! i tried that a few years ago and it blocked the rear tyres. it was a rwd, of course... i downshifted from 4th to 2nd and i shitted my pants
@@SpencerHHO lol
its called a run away. diesels dont need spark. just compression. so once oil starts gettin passed the rings the engine just keeps goin till it blows up, or you stop the air flow by stuffing something in the intake.
I don't know how many times I've watched this because it is my favorite!
yes if you watch very closely around 0:31 you can watch the rod fly out of the oil pan (the rods control the valves which let the air and fuel mixture into the piston and the exhaust out ).
yes but the pressure will keep building up because the pressure going into the cylinder is actually far grater than pressure going out. yes the burnt gases will escape through the intake but it will just re-enter again with the fuel with it.
That, my friend, Is the beautiful sound of metal on metal. It starts with a light scratching, then the heavy parts go in and you can hear everything getting torn apart on the inside. After that, there's only Nirvana
@danwat1234 What you saw was the brake arm being pressed against the tail-shaft. This is a destructive load test. What you see happen is the crankshaft twisting itself in two before breaking the oil pan to bits. Based on what I can see in the video, that engine was putting out at least 700bhp at close to 9k RPM based on the pitch of the engine.
@ youngdones anything can be fixed... looked to me like something cut loose in the top end and caused at least two rods to blow out of the oil pan. I'd be really surprised if the crank isn't junk too. So short answer is yes, but I'd say it's time to start with a new motor
I think is been properly explained already but yes is very likely been the case that a conn-rod bering seized (first squeaking) and may be they meant to continue the test or may be they were not looking?, weird but once the bearing seized to the crank shaft what happens is the rod cut of, and then the crankshaft keeps on turning of course with the part of the rod welded to that journal and brakes the block around loosing oil but also unbalancing the crankshaft very fast and surely #2
I love it as it shuttered to stop. Priceless !!!
+dougslittlediesel i don't know why it gave a rough shaking after the engine block was filled with holes and emptied from oil
may need a new set of mains and rod bearings
yes it seems it is a v8, I think someone else said that it was a marine engine, if so then i would expect it to be quite big. i would guess way over 5-6 liters.
#2 in this case causing other rod braking making more bit and pieces blow around, not a veri nice thing to do with an engine though, I guess it was a test of braking point? extrem load ? but it could happen in normal duty if oil pump fails or bad assembling or a very cold engine reved up to quickly
@JohnxWaynexGacy
it's a diesel, it ran away it sounds like meaning it ran off it's own oil somehow due to a failed ring, headgasket. anyway motor oil gets into the combustion chamber and because it's a compression fired engine, well you can't just turn off compression...
Awesome, broken connecting rods banging the molten pistons, crackshaft keeps spinning till end... what a pain..
Thanks.
This engine will self-destruct in 10 seconds. Good luck, Jim.
Love the cinder blocks
@YueyangC And yet the Toyota 1UZ-FE has a full Alloy Head, Block and Intake.... just shows that Alloy is good when made by the right people :D
@DSLCUMMINS MTU 8V 396. It's a marine diesel.
It looks like a MAN TGX V8 engine. (it is a diesel). They are made in Germany. Seems to have had a dyno-failure which released the load and underwent an over speed.
@BeeEmmW What I think happened here was that they were stress testing the engine by inducing abnormal forces on the crankshaft. I'm really no expert, but the sound that follows, and the noticeable movement of the engine makes me think they applied stress to the crankshaft, therefore overworking the engine causing it to blow. Could be wrong though??
Oh I see the problem no wiper fluid left yeah it will get u everytime
look over the back of the engine. There is a lever or some shit that goes down when the engine starts to make noise. Might be a bubble in a float gauge. Possibly oil pressure?
I heard of 2 stroke Detroits running away like this. Apparently even cutting the fuel is not enough to shut them down as they will start pulling oil from the crank case and burn that too. Only way to shut down a runaway Detroit is a co2 fire extinguisher to the intake. At least that's what I was told by a guy that seemed to be a pretty knowledgeable mechanic.
@Lnx805 That was a Mercedes-Benz OM441LA V6 Diesel Engine
@kimmer6 lol my friend actually jb welded a whole in his engine cause by a rod, and got it running again
Have fun clean that mess up !
This engine is a perfect example of humanity.... driving itself to the END
A shine to the cylinders and as good as new.
That was sweet. Never seen anything like it.
Its the timing, its all over the place........ So is the cam, valves, con rods, pistons, followers and the rockers! Apart from that it flew threw its MOT!!
I think that lever that moves is the torque arm of the dyno head. Could be wrong though. Highly doubt it's the 'governor'.
@jogrobler it makes the sound when an engine compresses something other than air, like water, possibly head gasket failed, water in cylinder(s) over compression and expansion BOOM - me thinks
If you see in the back it looks like they shut some kind of exhaust valve to create massive back pressure. Looks like it was some kind of test..you can hear the noise as you see that valve move down.
i worked in engine testing years ago i was standing next to a cosworth engine at full power 7000 rpm when the cardon shaft to the brake let go...it hit every wall in the test cell but i was lucky,dangerous job
you have to remember that the best diesel engines (which it what this is are detroits) and cummins and powerstroke which are made in the use
You could tell it wasn't going to last. I seen vibration before it was throttled up!
Small blocks are insanely easy and cheap to work on.
Yes, it's a test but we don't know if the engines destruction was part of the plan. I don't think it was supposed to happen but surely they have to consider things like that to happen. And as I said in another comment intake pressure is limited by a bypass valve, wastegate or blow off valves, it cannot increase endlessly.
i guess it comes to experience. the mine i worked at use Komatsu 1000hp engines to power their haul trucks and they never went wrong. same with the German engines they had in a few of the smaller 100 ton trucks. on the other end the Detroits with double super chargers where always down, but to be fair they where twice as old. but power wise detroit decimates all
it'll be fine! could probably do with a new air filter though, bits if metal and oil are on the old one, after that it should be good as new ;-)
@danwat1234 Destructive metalurgy testing, they wanted to simulate worst case scenario for determining mode of failure of the weakest component, in this case the crankshaft could not hold back the immense downforce put on it by the traveling piston near the back end of the engine. The closest real world analogy would be going from 100mph to 0 in 3 seconds or less without disengaging the driveline while at full throttle.
I LOVE watching these $20k to $40k engines grenade.
That was awesome!!!
Well.. thats why these engines are tested in the room, better there than in a vehicle
I think that was a Perkins 640 V8. The valve covers look right.
Its a Detroit. You can tell by the color of the block. Mercedes is silver/grey
looked like a v8 mack engine ENDT 865 they were made in the 70's or maybe an E9 which were 998 cu inch
@smpstech thats wat i was thinkin aswell an MTU the only thing that gave it away for me was the shape of the rocker covers the normaly have " MTU either stamped or cast with the cover
gotta love having a seized exhaust valve. no one could think one seized exhaust valve can do that much damage. well I believe it was an exhaust valve that caused it by the way it sounded. throwing all your Rods doesn't just happen. for something like that its most likely a seized exhaust valve and due to the pressure build up it threw rods and possibly the crank.
Always gotta check in on a classic occasionally.
holey crap. What did you do to the damn thing. did they push it to hard or did you do somthing more to it before you ran it?
ion, so peak cylinder pressure raises rapidly. I guess this test is made to see what happeneds if truck retarder (encreasing engine motoring torque by closing the exhaust) fails and accidently is enabled during full load engine operation.
@Irvs311 Remember that time Ford had to get bailed out?
Oh, right.
Very nice !
I nearly finished my engineer Bachelor and i can say that somehow one Piston or one bearing of the engine doesnt get lubricated enough, and u can hear the engine ream at 0:25 an after some time the bearings get to hot and it explodes :)
But olso could be something other, but this happens most of the time
Spoken like a true engineer with no field experience.
i owned 3 dodges a caddy and 2 camaros and a toyota. only one of them never let me down.
This Was Epic...
@BlueAlchemist Could have been the piston rings, especially if this is footage from an oil test where they ran the engine until the oil failed and it blew up. Honestly, that's what I suspect; it coulda been running for a week before it blew as far as we know. Interesting you'd say that about the crank -- that shrieking right before it blew sounded to me like a crank grinding against the block with no bearings between them. No bearings + seizing pistons = crankshaft go bye bye.
Hahaha they shrug off the fatal engine jerking and "ride that sucker out" for a full 6 or 7 seconds after! Nice driving bro!
never use a four stroke in racing or high energy applications. as well as the engine oil needs to be replaced with gear oil, which would lower the wear.
@vidmanproductions where were you ten years ago. honda engines now is considered to be the most reliable.
In your first post you said INTO the PISTON, and in your second you said cylinder. Number 2 is correct. And I never got on you about the valves because you were right on.
Your first engine sounds like the one in the video :-)
A little bit of JB Weld should be able to fix it.
boss,the oil warning light come on again!
I love the ekg flatline
Zachary Durand Must have been a cummins....., because after the block blew, the pullys rocketed and the oil was streaming out the rest of the topend, the pistons were still firing, LOL that's a keeper